At noon, ship A is 150 km east of ship B. Ship A is sailing east at 25 km/h and ship B is sailing north at 15 km/h. (a) What is the distance between the ships at 2:00 PM? (Round your answer four decimal places.) km (b) How fast is the distance between the ships changing at that instant? (Round your answer to two decimal places.) km/h DETAILS Let f(x) = x~ + 32 In(x) - 34x . (If an answer does not exist, enter DNE.) (a) Find the interval(s) on which fis increasing. (Enter your answer using interval notation.) (b) Find the interval(s) on which fis concave up. (Enter your answer using interval notation.)